Improvement in automatic tables foe teaching



DEC 102867 l @uiten gisten getest @fitta l `IIAISINAH MUNSON, O'F ROCKFORD, ILLINOIS, ADMINISTRATRIX OF THE ESTATE OF WILLIAM'G. MUNSVON, DlTCEASED.` Laim Patent No, 72,070, dass Detente 1o, 1867.

iMPnoVEMBNTIN AUToMATIc TABLES ron TEACHING.

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To ALL WI-IOM IT MAY CONGERN: I

i Be it known that I, HANNAJI MUNSON, admnstratrix of William C. Munson, deceased, of Rockford, in the county of Winnebago, and in the 'State of Illinois,'who invented certain newand useful Improvements in Automatic Tables, do herebydeclare that the following is a full, clear, andA exact description thereof, reference being had to the accompanying drawings, 4und to the letters of reference Inarked thereon.

i In the annexed drawings, ,making-part of this s'pecication, A represents a square frame, provided at its top `and bottom withhooks e e. D D- represent charts, which are provided at their upper ends with suitable inscriptions, as seen, and which are ruled-,horizontally and vertically with any required numberV of lines.

` These chartsare provided with loops a', which catch over the hookse e, for the purpose of securing them in the frames. C C represent pointers, whichare pivoted to the sides of the frame, as well as to bars or rods which lie across the face of the frame, as seen at B B. The bars B Bare used for each vertical line upon the face of" the chart, and are capable of being removed or being separated or moved closer together. These charts arevprovided upon their faces with inscriptions, words, land figures', similar to ythose seen in the Figures l, 2, and 3.

` The object of this chart is Ato propound questions or problems to'lscholars quickly and readily, and which may be varied instantly' without the voice of the teacher.

The heading or inscription upon theiiist figure reads thus: What is the interest or present worth of?" and isexplainerl as follows: The first pointer. points to the sum, $387 34; -thers'ecr-mdto 1 year; the third to 6 months; the fourth to 14 clays, and the fifth and 4sixth to 6 per cent. The child 4at once understands'the questionl to be, What is the iutereston three hundred -and eighty-seven dollars and thirty-four cents for one year, six months, and fourteen days, at'thc rate of sixper cent.l It will readily be seen that a change in the diroctioncf anyone of the pointers will vary the question. I

The chart in Figure 2 asks the question, What is lthe cost of twelve yards of' calico lat fifteen cents per. yard? and further asks how much 'pork it would take, at'niue cents` per pound, to paythe bill.

These charts maybe varied at pleasure, and can be made of great service to the teacher,as they save muchV time and much talking in che propounding of problems. p

Having thus fully described 'the invention, what I 'claim as new, and desire to secure by Letters'latent, is

The combination of the frame A with its pivoted pointers GC and hooks e e`,`and movable h pointers and charts D, as constructed, the whole being arranged `and used substantially as and for the purposes speced.

In testimony that I caim the foregoing, I have hereunto set my hand, this 22d day of May, 186i",

HANNAH MUNSON.

Witnesses:

JAMES W. HENRY, JAMES H. SnrnLAun. 

